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| author |   Andrei Dulea <adulea@amazon.de> | 2019-09-13 16:42:29 +0200 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2019-09-24 11:15:37 +0200 |
| commit | 6ccb72f8374e17d60b58a7bfd5570496332c54e2 (patch) | |
| tree | 58153196ad6c1423e86fa4388cd402bb13fe384f /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | iommu/amd: Fix pages leak in free_pagetable() (diff) | |
| download | wireguard-linux-6ccb72f8374e17d60b58a7bfd5570496332c54e2.tar.xz wireguard-linux-6ccb72f8374e17d60b58a7bfd5570496332c54e2.zip | |
iommu/amd: Fix downgrading default page-sizes in alloc_pte()
Downgrading an existing large mapping to a mapping using smaller
page-sizes works only for the mappings created with page-mode 7 (i.e.
non-default page size).
Treat large mappings created with page-mode 0 (i.e. default page size)
like a non-present mapping and allow to overwrite it in alloc_pte().
While around, make sure that we flush the TLB only if we change an
existing mapping, otherwise we might end up acting on garbage PTEs.
Fixes: 6d568ef9a622 ("iommu/amd: Allow downgrading page-sizes in alloc_pte()")
Signed-off-by: Andrei Dulea <adulea@amazon.de>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions